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Finding the Fourth Proportional to 8,340.78, 12,511.71 and 2,793.90

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Solution

The fourth proportional to 8,340.78, 12,511.71 and 2,793.90 is: 4,191.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,340.78 : 12,511.71 = 2,793.90 : x
  2. Step 2: Convert to fraction form
    8,340.78/12,511.71 = 2,793.90/x
  3. Step 3: Cross multiply
    8,340.78x = 12,511.71 × 2,793.90
  4. Step 4: Simplify right side
    8,340.78x = 34,956,466.57
  5. Step 5: Solve for x
    x = 34,956,466.57/8,340.78
  6. Step 6: Final answer
    x = 4,191.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.